LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

[Ritalin]

So I recently scored this TV for FREE off craigslist. They said that there's sound but no picture. Looking at the power supply, there are 8 blown caps. So I figured I'd replace those, plus the other ones on that side that aren't blown (yet).

But I'm use to computer monitors and don't quite know what type of caps to get for a large tv.

The values are below and what I was thinking of getting...

3300uF @ 10V = QTY: 9 * Cheaper alternative?

820uF @ 250wV = QTY: 2

100uF @ 50V = QTY: 2

100uF @ 25V = QTY: 1

680uF @ 63V = QTY: 1

680uF @ 50V = QTY: 1

1000uF @ 10V = QTY: 1

330uF @ 10V = QTY: 1

470uF @ 100V = QTY: 2

Service Manual - CLICK HERE

List of Bad Caps.
C227
C203
C202
C201
C223
C262
C255
C251
C261
C275
C283
C281
C282
C272
C271
C285
C904
C901

*Working on pictures now*

[retiredcaps]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Obviously you are free to order caps from where ever you want. One of the things I like about digikey's website is that is lists the ripple, ESR, etc with the cap description. Newark.com doesn't seem to have the same info. Instead, I have to hunt down and track every datasheet.

For the 3300uF 10V cap which is all I researched for you, the United Chemi-con KZE 3300uF 10V has better specs than Panasonic FR in all aspects except lifetime.

http://search.digikey.com/us/en/prod...1651-ND/756167

And at 10 or more, they are 61 cents each which is 1/2 the price of the FR cap at newark. I just saved you $6.06 and you get a spare cap. 3300uF 10V are also commonly found in ATX power supplies.

There is no price break for Panasonic FR on digikey's website until you buy 50. When I first started here, digikey used to have a price break for 10, but I'm thinking our recommendations to use digikey for DIY orders may have prompted someone there to take notice?

For another Philips TV thread, I actually recommended KZE over Panasonic FM as the KZE was 1/2 price. I'm brand agnostic. I'll use Rubycon, Panasonic, United Chemi-con, and/or Nichicon depending on what I can find and price.

[Ritalin]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Thank you good sir!

I know digikey, mouser, newark, kind of have all the same search feature.. besides capacitance, voltage, size, etc... what are the other key features to look for? You mentioned ripple and ESR... how does that play into effect?

[retiredcaps]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

You mentioned ripple and ESR... how does that play into effect?

See my example below

https://www.badcaps.net/forum/showpo...4&postcount=19

PCBONEZ explains ripple, ESR at

https://www.badcaps.net/forum/showpo...30&postcount=7

PS. For some Canadians, you have to make/earn $12 in order to have $6 after all the taxes. That is, some Canadians are taxed 50% on their income.

[retiredcaps]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

1) And with Digi-key, you are supporting your own local state.

http://www.digikey.com/us/en/info/Company-Profile.html

Digi-Key Corporation
701 Brooks Avenue South Thief River Falls, MN 56701

Number of Employees: 2,500 plus

2) Great growth numbers, but it is not a publicy traded company so I don't know how profitable they are.

In only six years, Digi-Key has moved from 16th largest to 5th largest among the more than 300 electronic component distributors in North America. "We believe Digi-Key provides the best service in the industry," says Digi-Key president Mark Larson. "With a nearly 22 percent compound annual rate of sales growth over the past 20 years—none as a result of acquisition—there is perhaps no greater testimony to the quality Digi-Key provides its customers. Service is what differentiates one distributor from another. Service is what differentiates Digi-Key from other electronic component distributors. Superior service and breadth and quality of product offered are key factors in driving Digi-Key's growth internationally."

[tom66]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Don't be fooled by the bad caps - I was!

I repaired one of these that had 10 caps in it all bulged. Although they were all faulty and needed replacement they are often not the root cause.

No need to replace the high voltage ones. Anything <=63V should be replaced.

In your case it's probably a Y-sustain issue.

[Ritalin]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Don't be fooled by the bad caps - I was!

I repaired one of these that had 10 caps in it all bulged. Although they were all faulty and needed replacement they are often not the root cause.

No need to replace the high voltage ones. Anything <=63V should be replaced.

In your case it's probably a Y-sustain issue.

Thanks for the heads up. I usually start at the power board and work my way out. Plus since I have it open, I might as well replace the caps. It would be great if it's just the caps, but knowing my luck, it probably isn't.

[Ritalin]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Don't be fooled by the bad caps - I was!

I repaired one of these that had 10 caps in it all bulged. Although they were all faulty and needed replacement they are often not the root cause.

No need to replace the high voltage ones. Anything <=63V should be replaced.

In your case it's probably a Y-sustain issue.

Alrighty all knowing Tom... what' next... Caps didn't work... Did you fix the y-sustain or replace it?

[tom66]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Ah, you have sound... didn't realise this...

Check the fuses on both boards. One is probably blown.

Does a relay click continuously? Or does it just click once or twice then try to start up?

I haven't had the pleasure of repairing or replacing the Y-sustain on this model, but have seen it occur on other LG plasmas, and it's a common fault. People sell a repair kit which includes a fuse and hybrid IC, for around £30. The hybrid IC is what fails in 90% of cases. Unfortunately, it's very difficult to remove, due to how it is mounted. Ask PlainBill...

[Ritalin]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

I think it clicks once or twice, but then stops and all i hear is static. But that's cause I'm not feeding any signal into it. I've noticed on ebay that there's a few people that sell 'kits'... If I can find where to buy the module separate, that'd be great.

[tom66]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

I think it clicks once or twice, but then stops and all i hear is static. But that's cause I'm not feeding any signal into it. I've noticed on ebay that there's a few people that sell 'kits'... If I can find where to buy the module separate, that'd be great.

The IPM itself is quite expensive, so you're not saving much by buying it alone.

Check the fuses using a multimeter to confirm this; 90% of the time the fuse blows. 10% of the time, it doesn't, but then the TV won't start up.

Also, post a picture of your buffer boards; I'll show you where to check for a shorted buffer.

[rpgruss]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Coppell TV repair has a blog entry on checking the IPM for shorts, if you want confirmation: http://blog.coppelltvrepair.com/2011...s-ipm-for.html

It says for 50" in the title, but I used it for 2 different LG plasmas that were 42", and both had blown IPMs.

I'll speak from experience here, it is a pain in the ass to change that chip out. The massive heatsink is screwed in from the bottom, so you are constantly fighting it to get the solder joints hot enough. I have another one that needs to be fixed, I'm not sure if it's worth the $40 savings to do it myself.

[Ritalin]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

Thanks guys for the info, I'll have to get pictures/values up when I get home from work today. Considering I got the TV free and currently have a 27" CRT, it might be worth paying the ~$15 for the chip and fight to get it repaired. Plus it will be a good learning experience.

[budman67]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

I got a 42PC3DV LG PLASMA TV off cl for $40, and ordered the caps before the tv got dropped by the house.....took the back off to find all good caps......and the y sus had been replaced...was getting all my voltages but the sus board had only 2 nof the 5 screws holding on....went to remove the digital to install the lower screw only to find that the ribbon cable to the t con board wasnt even hooked up....cant be that easy right??? hooked it up and put it back together...plugged it back in and OMG!!!...i wish they were all that easy....now i have the caps on had when they do decide to go thanks for reading

[tom66]

Re: LG 42" Plasma - 42PC3DV-UD - Sound, No Picture

That's great to hear. I got a 46" FHD Panasonic plasma with a loose cable like that too, for very little. Has worked perfect since I clipped cable back into place.